function request(strName)
{
    var strHref=window.location.search;
    var intPos = strHref.indexOf("?"); 
    var strRight = strHref.substr(intPos + 1); 

    var arrTmp = strRight.split("&"); 
    for(var i = 0; i < arrTmp.length; i++) 
    { 
        var arrTemp = arrTmp[i].split("="); 

        if(arrTemp[0].toUpperCase() == strName.toUpperCase()) return arrTemp[1]; 
    } 
    return ""; 
}